VP522A1005
Details
Details
VP522A1005 Proportioning-Sequencing Water Valve, 1/2 in. OD Flare, Cv 1.5/1.5 (Port A/B)
Sequences hot and cold water through one coil on three-pipe fan-coil and induction units.
As control air rises, the hot port closes, both ports stay shut through a dwell, then the cold port opens.
Pair it with a VP522B on the coil return for four-pipe systems.
Takes 45-degree SAE flare nuts, which are not included.
Key Features
- Cv 1.5 port A, 1.5 port B
- 50 psi close-off
Product Specifications
| Manufacturer | Honeywell |
|---|---|
| Model | VP522A1005 |
| Product type | Pneumatic sequencing water valve, proportioning-sequencing (hot and cold ports) |
| Size | 3/8 in. nominal for 1/2 in. OD copper tubing |
| Connection | 45 degree SAE flare |
| Cv | Port A 1.5; port B 1.5 |
| Close-off | 50 psi (345 kPa) |
| Flow characteristic | Equal percentage through 5/16 in. lift for either port |
| Startpoint and operating range | Nonadjustable sequence: hot port closes, both ports closed (dwell), then cold port opens as air pressure rises |
| Body pressure rating | 250 psi (1724 kPa) nominal |
| Medium temperature | 35 to 250 deg F (2 to 121 deg C) |
| Body | Forged brass |
| Seats | Brass; upper seat replaceable, lower seat integral |
| Disc | Molded-in composition |
| Plug | Brass |
| Packing | Rubber V-ring, spring loaded, self adjusting |
| Stem | Stainless steel |
| Actuator | Molded neoprene, rolling diaphragm |
| Air connection | Combination barb for 5/32 in. (4 mm) or 1/4 in. (6 mm) OD plastic tubing |
| Max safe air pressure | 25 psi (172 kPa) |
| Max safe diaphragm temperature | 160 deg F (71 deg C) |
| Mounting | Operator rotates 360 degrees for air piping alignment |
| Dimensions | 9-13/16 x 5-1/8 x 3-5/8 in. (249 x 130 x 92 mm) |
| Honeywell form | 77-5230 |